Wrench.



PATENTBD APR. 23, 1907.

J. P. TINER.

WRENCH. v APPLICATION FILED APB.5. 1906.

2 SHEETS-SHEET 1.

$1 wuc/wroz JOHN F. TINER, or UvALDE, TEXAS.

WRENCH.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed April 5, 1906. Serial No, 310,032.

To all rim/rt it may concern:

Be it known that I, JOHN F. TINER, a citizen of the United States, aresident of Uvalde, in the county of Uvalde and State of Texas, havemade a certain new and useful Invention in l/Vrenches; and I declare thefollowing to be a full, clear, and exact description of the same, suchas will enable others skilled in the art to which it appertains to makeand use the invention, reference being had to the accompanying drawings,and to letters or figures of reference marked thereon, which form a partof this specification.

Figure 1 is a side view of the wrench, partly broken away, with theparts in normal position. Fig. 2 is a similar view with the handle leverthrown out to release the teeth of the dog from the teeth of the fixedjaw shank. Fig. 3 is a similar view with the handle lever closed towardthe fxed aw shank. Fig. t is a side view of the wrench, with the partsin normal position, the positions of the parts when the handle lever isclosed toward the fixed jaw shank being shown in dotted lines. Fig. 5 isa detail sectional view on a larger scale, with the parts in normalposition. Fig. 6 is a similar view with the handle lever thrown outwardto release the teeth of the pivoted dog from the teeth o'f the fixed jawshank. 'Fig. 7 is a similar view with the handle lever closed toward thefixed jaw shank. Fig. 8 is a detail perspective view of the dog. Fig. 9is a similar view of the handle lover.

The invention has relation to wrenches of that type wherein the movablejaw and its operating lever are on opposite sides of the shank or" themain jaw, and it consists in the novel construction and combinations ofparts, as hereinafter set forth.

The object of the invention is to provide a powerful wrench of simpleconstruction, wherein the movement for the operation of the jaws is ofslight degree, partially automatic and easily effected.

In the accompanying drawings, the letter a, designates the main jaw, and1), its shank, which is straight, the jaw a, extending from its end atright angles. The opposite side of the shank b, from the jaw a, isprovided with a series o1 teeth 0, at about its middle portion. Theseteeth are incut, or set with their outer ends even with the plane of theside of the shank, so that the slide end of the lever of the movable jawwill readily pass over them when this jaw is being adjusted.

The movable jaw d, is provided with a short shank 6, extending along themain shank, and the adjacent sides of this short shank and the mainshank are smooth. The jaw (Z, extends at right angles to the shortshank, parallel to the main jaw. The movable jaw is connected to theshank of the main jaw by a broad loop j, which is sufficiently loose toallow the movable jaw to rock a little.

The handle lb, is recessed at its upper end at k, and has, at its upperend portion, within the inclosing side and back walls of such recess, adog It, provided with several teeth, usually five or six on the sidenext the main shank. These teeth project from the inner lateral surface714- of the dog, as indicated at m said lateral surface being roundedoutward to the upper end of the dog to provide a rounded extension orslide end p, beyond the teeth m. The dog is pivoted to the inclosingside walls of the handle lever intermediately of the length of the dogat 7 and so that its rear wall is near the? rear wall or bearing of therecess of the angle lever, but sufficiently removed therefrom to allow alittle vibratory motion when the movable jaw is reciprocated withrelation to the fixed jaw.

In the operation of this wrench, the action for disengagement andreadjustment depends upon the conjoint operation, in connection with thefixed jaw and movable aw shards, of an angle lever, and a compoundsliding and toothed. dog pivoted to said angle lever at the obtuse anglethereof, whereby the d isengagement is effected directly by the pressureof the lever on the slide end portion of the dog, in conjunction withthe pressure of the rounded slide end of the dog against the fixed jawshank, forming a new fulcrum for the handle lever and dog at the pointof pressure. The readjusting reciprocatory movement is facilitated bythe independent vibratory motion of the dog.

The end of the short shank of the movable jaw is pivoted at s to cheeklugs g of the handle lever it, said lugs embracing or straddling themain shank of the wrench. The pivot 02 is so located with respect to theful crum pivot 72 that a line joining these two points has an obtuseangle relation to the handle end of the lever 71 of about one hundredand thirty five degrees. A spring 8 is located between the movable jawshank and the main or fixed jaw shank, being shown as connected to themovable jaw shank and sliding upon the fixed jaw shank. The handle itwill thus upon release thereof after action of the wrench jaws upon thework, be swung outward upon the fulcrum pivot kg of the dog to a slightextent, through the operation of the spring 8, and owing to the obliqueor obtuse angle relation of the work arm of the handle lever to itshandle end or power arm, the pivot 12, with the movable jaw and itsshank will be drawn or retracted from the work to a slight extent, sothat its engagement therewith will be released sufficiently to allow thewrench to be turned on the work for a new purchase. The dog 75, willduring this operation remain stationary with all of its teeth engagedwith the teeth of the main shank. The rear wall of the handle levernormally bears at one end portion upon the slide and fulcrum end portionof the pivoted dog, and movement of the handle lever toward the fixedjaw shank without disturbance of the adjustment of the dog is allowedfor by a space marked m between the rear wall of the handle lever andthe dog, gradually increasing in width toward the other end of the dog.Thus at all stages of the operation of the wrench upon the work theteeth of the dog are all engaged with the teeth of the shank of thefixed jaw. When however, it is desired to adjust the movable jaw forlarger or smaller work, the handle lever is brought outward from normalpositionwhen the dog acts as a rigid. part of the lever and rockstherewith upon its rounded slide end which is always in engagement withthe hiked aw shank forming a new fulcrum upon which the handle leverturns to effect a disengagement of the teeth of the dog from the teethof the main shank, when the movable jaw and the handle lever are freefor longitudinal movement to effect the desired adjustment, the dog is,sliding along the inset line of teeth m, upon its rounded slide end. Theteeth of the dog are thus disengaged from the teeth of the main shankonly when adjustment for larger or smaller work is needed.

The handle lever may be formed entirely of sheet metal, as shown, beingbent into the required form and open at the inner side from top tobottom.

The wrench can be instantly adjusted, has but little wear of the parts,takes a" perfect grip with a slight adjustment of the parts, slackensthe grip automatically to take a new hold, will turn in eitherdirection, and will not crush or deface the finest work.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is l. A wrench consisting of a main jaw havinga shank provided with a series of teeth on the opposite side thereoffrom the jaw, a movable aw having a short shank, a spring between themovable and fixed jaw shanks, an obtuse-angle handle lever having apivotal connection with the end of the movable jaw shank, a lever doghaving a series of teeth adapted to engage the teeth of the main jawshank, said dog being loosely pivoted to the handle lever at the anglethereof, and having a rounded slide and fulcrum end above its toothedportion and pivot, substantially as specified.

2. A wrench, consisting of a main jaw having a shank provided with aseries of teeth on the opposite side thereof from the jaw, a movable jawhaving a short shank, and carrying a spring between 'the movable andfixed j aw shanks, an obtuse-angle handlelever having a pivotalconnection with the end of the movable jaw shank, a lever dog having aseries of teeth normally in engagement with the teeth of the fixed jawshank, said (log having a fulcrum pivot connection with the handle leverat the obtuse angle thereof and upon which fulcrum pivot the levernormally works, and a rounded slide and fulcrum end above its toothedportion and fulcrum pivot, the handle lever being adapted when thrownoutward to engage the slide end portion of the dog and rock the sameinto contact at its rounded end with the fixed jaw shank, whereby a newfulcrum is taken at such point of contact to effect disengagement of theteeth of the dog from the teeth of the fixed jaw shank.

In testimony whereof I affix my signature, in presence of two witnesses.

JOHN F. TINER.

W itnesses:

JOHN O. MEUsEBAon, H. C. LINDSAY.

